Subject: c/h failed; cold weather coming; help!
"I hope someone can help me out here!
My heating (baxi back boiler) was working this morning, but isn't now.
But the hot water's ok so boiler, thermostat, pilot, pump etc are
Many thanks to all contributors for correctly diagnosing the fault (3
port valve) and for a load of background info and references that helped
enormously in fixing it.
The valve was an elderly one piece Gyr and Landis, long out of print.
My friendly local - ish shop (plug for Bookers of Wickford) suggested a
Danfoss 2 part unit as a plug in replacement which went in perfectly and
worked first time. The price made me eyes water a bit, though. But he
would take it back if I didn't think it would fit.
Incidentally one reason for panic is that all sensible shops like tools,
bearings, 3 port valves are miles away, I use a motorbike and ice and
snow were forecast - could visualise me and mog being Cut Off, socked in,
freezing, last diary entry "Great God, this is a dreadful place, have
just ate the cat and out of lager..."
The wiring colour code wasn't identical but the background info sorted
Draining down wasn't too bad as all my rads are top down fed so only some
piping needed emptying.
Fired it all up again and worked a treat, moggie and me are snug again.
So thanks again for all the expertise freely given, I'll get you all a